Final answer:
Godfrey of Bouillon became the first ruler of Jerusalem during the First Crusade.
Explanation:
Godfrey of Bouillon became the first crusader ruler of Jerusalem. During the First Crusade, after the successful siege of Jerusalem in 1099, Godfrey of Bouillon was elected as the defender of the Holy Sepulcher and became the first ruler of the newly established Kingdom of Jerusalem.
Learn more about First Crusade here:
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